I've installed 8 or 10 of em...not really a problem in the pass side for room, everything tucks in pretty well. It gets hot as hell here in Odessa in dead summer...120 occasionally. It does cool, but won't take a 120 degree interior down to 55. Maybe down to 75 or 80, if you have tint, and insulate the floor and firewall. Last couple had problems with wiring/switching valves, all worked out in the end, but took some doing. On the heat side, it's all or nothing on the heat valve...solenoid actuated, no "kinda" warm setting. You'll probably want to source an old Ford heater valve for the adjustability. At one time they had some real problms with the compressor brackets fitting right, but no recent problems with that for me. It's a huge pain in the ass to find the right "section b" belt...irregardless of what they say, for some reason, they all seem to take a little bit different length. Keep in mind this is a 134a system that was probably originally designed for r12....doesn't cool quite as well as it could in extreme conditions. I prefer the Vintage to CCOT or others, because it has vents all across the dash, including left of the steering column (US for you Aussies..) First one took me a week, now I can probably do it now in 4 or 5 hours. Don't forget to add in the cost of having it evacuated/charged... It's extremely tight under the dash to hook up all the lines...and the cover to the original blower motor location has the hoses run thru it...very very fragile. I had the last one replicated at a sheet metal shop.